<?php
namespace Chat\Model;

use Chat\Model\IdentityMapAbstract;

class IdentityMap extends IdentityMapAbstract {
	
	public  function __construct(DataMapperInterdace $dm){
		$this->_dataMapper = $dm;
		return $this;
	}
	
// 	@param $id;
// 	@return bool
	private function isPostCached($id){
		
	}
	
	private function fetchMessageById($id){
		
	}
}